Julia Cameron's book "The Artists Way", is a great way to enhance or kick start creativity in your life.  In the book she outlines several tools to stimulate creativity in all areas of your life.  Whether you are an accountant with a passion for writing fiction, a professional painter or an executive who does not see themselves as creative in a shape or form this book will speak to you.  If you follow the steps outlined in the book by the end you will have some solid creative habits and a flurry of creative activity in your life.  I highly recommend this book.